iilyak commented on issue #501: Fix error on race condition in mem3 startup URL: https://github.com/apache/couchdb/pull/501#issuecomment-298691336 > Question: Why not call couch_db:open/2 with Options including create_if_missing once, and if that fails with file_exists, just call it again without that option? Thank you @wohali your suggestion is great. Following works locally: ``` diff --git a/src/mem3/src/mem3_util.erl b/src/mem3/src/mem3_util.erl index 2cd444d..71ef5b6 100644 --- a/src/mem3/src/mem3_util.erl +++ b/src/mem3/src/mem3_util.erl @@ -214,11 +214,12 @@ shard_info(DbName) -> ensure_exists(DbName) when is_list(DbName) -> ensure_exists(list_to_binary(DbName)); ensure_exists(DbName) -> - case couch_db:open(DbName, [nologifmissing, sys_db | [?ADMIN_CTX]]) of + Options = [nologifmissing, sys_db, {create_if_missing, true}, ?ADMIN_CTX], + case couch_db:open(DbName, Options) of {ok, Db} -> {ok, Db}; - _ -> - couch_server:create(DbName, [?ADMIN_CTX]) + file_exists -> + couch_db:open(DbName, [sys_db, ?ADMIN_CTX]) end. ``` ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
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